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Sieverts, E.G.; Figdor, J.; Bakker, S.; Hofstede, M.: Software for information storage and retrieval tested, evaluated and compared : Pt.3: End-user software (1992)
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- Electronic library. 10(1992), S.5-19
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Sieverts, E.G.; Hofstede, M.: Software for information storage and retrieval tested, evaluated and compared : Pt.1: General introduction (1991)
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- Electronic library. 9(1991), S.145-153
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Hofstede, M.: Literatuur over onderwerpen zoeken in de OPC (1994)
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- CRI bulletin. 29(1994), Sept., S.14-15
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Sieverts, E.G.; Hofstede, M.; Haak, P.H.; Nieuwenhuysen, P.; Scheepsma, G.M.A.; Veeger, L.; Vis, G.C.: Software for information storage and retrieval tested, evaluated and compared : Pt. 2: Classical retrieval systems (1991)
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- Electronic library. 9(1991), S.301-316
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Hofstede, M.: Zoeken in PiCarta : de proef op de som (1998)
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- Informatie professional. 2(1998) no.11, S.16-21
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Sieverts, E.G.; Hofstede, M.; Nieuwland, A.; Groeneveld, C.; Zwart, B. de: Software for information storage and retrieval tested, evaluated and compared : pt.6: various additional programs (1993)
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- Electronic library. 11(1993) no.2, S.73-92
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Sieverts, E.G.; Hofstede, M.: Software for information storage and retrieval, evaluated and compared : pt.7: what to choose, or the purpose of it all (1994)
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- Electronic library. 12(1994) no.1, S.21-26
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Sieverts, E.G.; Hofstede, M.; Groeniger, B.O.: Software for information storage and retrieval tested, evaluated and compared : pt.4: indexing and full-text retrieval programs (1992)
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- Electronic library. 10(1992) no.4, S.195-207